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1 | As PicoDrive is multiplatform emulator, this is GP2X specific part of readme\r |
2 | about configuration.\r |
3 | \r |
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4 | If you have questions, you can use GP32X to ask for help.\r |
5 | http://www.gp32x.com/board/index.php?showforum=48\r |
6 | \r |
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7 | \r |
8 | Configuration\r |
9 | -------------\r |
10 | \r |
11 | 1. "Renderer"\r |
12 | 8bit fast:\r |
13 | This enables alternative heavily optimized tile-based renderer, which renders\r |
14 | pixels not line-by-line (this is what accurate renderers do), but in 8x8 tiles,\r |
15 | which is much faster. But because of the way it works it can't render any\r |
16 | mid-frame image changes (raster effects), so it is useful only with some games.\r |
17 | \r |
18 | Other two are accurate line-based renderers. The 8bit is faster but does not\r |
19 | run well with some games like Street Racer.\r |
20 | \r |
21 | 2. "Accurate timing"\r |
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22 | This adds some more emulation precision, but slows the emulation down. Without\r |
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23 | this option some games do not boot (Red Zone for example), others have sound\r |
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24 | problems. This options has no effect for Sega/Mega CD emulation.\r |
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25 | \r |
26 | 3. "Accurate sprites"\r |
27 | This option improves emulation of sprite priorities, it also enables emulation\r |
28 | of sprite collision bit. If you see one sprite being drawn incorrectly above\r |
29 | the other (often seen in Sonic 3D Blast), you can enable this to fix the problem.\r |
30 | This only works with the default renderer (see first option).\r |
31 | \r |
32 | 4. "Show FPS"\r |
33 | Self-explanatory. Format is XX/YY, where XX is the number of rendered frames and\r |
34 | YY is the number of emulated frames per second.\r |
35 | \r |
36 | 5. "Frameskip"\r |
37 | How many frames to skip rendering before displaying another.\r |
38 | "Auto" is recommended.\r |
39 | \r |
40 | 6. "Enable sound"\r |
41 | Does what it says. You must enable at least YM2612 or SN76496 (in advanced options,\r |
42 | see below) for this to make sense.\r |
43 | \r |
44 | 7. "Sound Quality"\r |
45 | Sound rate and stereo mode. If you want 44100Hz sound, it is recommended to enable\r |
46 | the second core (next option).\r |
47 | \r |
48 | 8. "Use ARM940 core for sound"\r |
49 | This option causes PicoDrive to use ARM940T core (GP2X's second CPU) for sound \r |
50 | (i.e. to generate YM2612 samples) to improve performance noticeably.\r |
51 | \r |
52 | 9. "6 button pad"\r |
53 | If you enable this, games will think that 6 button gamepad is connected. If you\r |
54 | go and reconfigure your keys, you will be able to bind X,Y,Z and mode actions.\r |
55 | \r |
56 | 10. "Genesis Region"\r |
57 | This option lets you force the game to think it is running on machine from the\r |
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58 | specified region, or just to set autodetection order. Also affects Sega/Mega CD.\r |
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59 | \r |
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60 | 11. "Use SRAM/BRAM savestates"\r |
61 | This will automatically read/write SRAM (or BRAM for Sega/Mega CD) savestates for\r |
62 | games which are using them. SRAM is saved whenever you pause your game or exit the\r |
63 | emulator.\r |
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64 | \r |
65 | 12. "GP2X CPU clocks"\r |
66 | Here you can change clocks of both GP2X's CPUs. Larger values increase performance.\r |
67 | There is no separate option for the second CPU because both CPUs use the same clock\r |
68 | source. Setting this option to 200 will cause PicoDrive NOT to change GP2X's clocks\r |
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69 | at all (this is if you use external program to set clock).\r |
70 | \r |
71 | 13. "[Sega/Mega CD options]"\r |
72 | Enters Sega/Mega CD options menu (see below).\r |
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73 | \r |
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74 | 14. "[advanced options]"\r |
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75 | Enters advanced options menu (see below).\r |
76 | \r |
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77 | 15. "Save cfg as default"\r |
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78 | If you save your config here it will be loaded on next ROM load, but only if there\r |
79 | is no game specific config saved (which will be loaded in that case).\r |
80 | \r |
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81 | 16. "Save cfg for current game only"\r |
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82 | Whenever you load current ROM again these settings will be loaded (squidgehack and\r |
83 | RAM settings will not take effect until emulator is restarted).\r |
84 | \r |
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85 | \r |
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86 | Advanced configuration\r |
87 | ----------------------\r |
88 | \r |
89 | Enter [advanced options] in config menu to see these options.\r |
90 | \r |
91 | 1. "Scale 32 column mode"\r |
92 | This enables hardware scaling for lower-res genesis mode (where width is\r |
93 | 32 8-pixel tiles, instead of 40 in other mode).\r |
94 | \r |
95 | 2. "Gamma correction"\r |
96 | Alters image gamma through GP2X hardware. Larger values make image to look brighter,\r |
97 | lower - darker (default is 1.0).\r |
98 | \r |
99 | 3. "Emulate Z80"\r |
100 | Enables emulation of Z80 chip, which was mostly used to drive the other sound chips.\r |
101 | Some games do complex sync with it, so you must enable it even if you don't use\r |
102 | sound to be able to play them.\r |
103 | \r |
104 | 4. "Emulate YM2612 (FM)"\r |
105 | This enables emulation of six-channel FM sound synthesizer chip, which was used to\r |
106 | produce sound effects and music.\r |
107 | \r |
108 | 5. "Emulate SN76496 (PSG)"\r |
109 | This enables emulation of additional sound chip for additional effects.\r |
110 | \r |
111 | Note: if you change sound settings AFTER loading a ROM, you may need to reset\r |
112 | game to get sound. This is because most games initialize sound chips on\r |
113 | startup, and this data is lost when sound chips are being enabled/disabled.\r |
114 | \r |
115 | 6. "gzip savestates"\r |
116 | This will always apply gzip compression on your savestates, allowing you to\r |
117 | save some space and load/save time.\r |
118 | \r |
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119 | 7. "Don't save config on exit"\r |
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120 | This will disable config autowrite on exit (which might cause SD card corruption\r |
121 | according to DaveC).\r |
122 | \r |
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123 | 8. "craigix's RAM timings"\r |
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124 | This overclocks the GP2X RAM chips, but may cause instability. Recommended if you\r |
125 | use the second core for sound. Needs emulator restart to take effect.\r |
126 | See this thread:\r |
127 | http://www.gp32x.com/board/index.php?showtopic=32319\r |
128 | \r |
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129 | 9. "squidgehack"\r |
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130 | Well known way to improve the GP2X performance. You must restart the emulator\r |
131 | for the change of this option to take effect.\r |
132 | \r |
133 | \r |
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134 | Sega/Mega CD options \r |
135 | --------------------\r |
136 | \r |
137 | 1,2,3. "USA/EUR/JAP BIOS"\r |
138 | These options just shows if your BIOS files were correctly detected be the\r |
139 | emulator (it shows the filename it is using). If so, you can press Start to test\r |
140 | your BIOS.\r |
141 | \r |
142 | 4. "CD LEDs"\r |
143 | The Sega/Mega CD unit had two blinking LEDs (red and green) on it. This option\r |
144 | will display them on left-top corner of the screen.\r |
145 | \r |
146 | 5. "CDDA audio (using mp3s)"\r |
147 | This option enables CD audio playback.\r |
148 | \r |
149 | 6. "PCM audio"\r |
150 | This enables 8 channel PCM sound source. It is required for some games to run,\r |
151 | because they monitor state of the audio chip.\r |
152 | \r |
153 | 7. "ReadAhead buffer"\r |
154 | This option is for dealing with slow SD card access in GP2X, which makes FMV\r |
155 | games unplayable. It will allow emulator not to access SD card for longer periods\r |
156 | of time, but it will take more time to fill the buffer.\r |
157 | \r |
158 | 8. "Scale/Rot. fx"\r |
159 | The Sega/Mega CD had scaling/rotation chip, which allows effects similar to\r |
160 | "Mode 7" effects in SNES. Unfortunately emulating it is slow, and very few games\r |
161 | used it, so it's better to disable this option.\r |
162 | \r |
163 | 9. "Better sync"\r |
164 | This option is similar to "Perfect synchro" in Gens. Some games require it to run,\r |
165 | for example most (all?) Wolfteam games, and some other ones. Don't use it for\r |
166 | games which don't need it, it will just slow them down.\r |
167 | \r |
168 | \r |
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169 | Key configuration\r |
170 | -----------------\r |
171 | \r |
172 | When you select "Configure controls" from the menu, you enter a key configuration\r |
173 | mode, where you use SELECT to change an action, and then press a key you like to\r |
174 | bind to that action. You can press the same key again to unbind. Select "DONE"\r |
175 | action and press any key to finish.\r |
176 | \r |
177 | \r |